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Finding the Fourth Proportional to 18,001.71, 27,011.48 and 8,139.96

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Solution

The fourth proportional to 18,001.71, 27,011.48 and 8,139.96 is: 12,213.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,001.71 : 27,011.48 = 8,139.96 : x
  2. Step 2: Convert to fraction form
    18,001.71/27,011.48 = 8,139.96/x
  3. Step 3: Cross multiply
    18,001.71x = 27,011.48 × 8,139.96
  4. Step 4: Simplify right side
    18,001.71x = 219,872,326.04
  5. Step 5: Solve for x
    x = 219,872,326.04/18,001.71
  6. Step 6: Final answer
    x = 12,213.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.